Journal
PHYSICAL REVIEW LETTERS
Volume 126, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.067401
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Funding
- Hong Kong Research Grants Council [AoE/P-02/12, 16303119]
- National Natural Science Foundation of China [12074230]
- National Key R&D Program of China [2017YFA0304203, 1331KSC]
- Shanxi Province 100-Plan Talent Program
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By utilizing hetero-structures of photonic crystals, we have achieved large-area one-way transport with uniformly distributed one-way waveguide states, which can concentrate energy and are robust against defects and localization effects.
We have theoretically and experimentally achieved large-area one-way transport by using hetero-structures consisting of a domain of an ordinary photonic crystal sandwiched between two domains of magnetic photonic crystals. The nonmagnetized domain carries two orthogonal one-way waveguide states which have amplitude uniformly distributed over a large area. We show that such one-way waveguide states can be used to abruptly narrow the beam width of an extended state to concentrate energy, and the transport is robust against different kinds of defects and imperfections. They are also immune to the Anderson-type localization when large randomness is introduced.
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